Arthur's Stone Pre-Solstice Horizon Marker

The Neolithic chambered tomb known as Arthur's Stone in Herefordshire, England has many possible astronomical connections, including being situated in the landscape in such a way as to create an ideal pre-solstice horizon marker at a significant division of the year.

See further discussion of this alignment with this post from Mark Byrne on the Archaeoastronomy Database Facebook page:
  / 1005018796846067  

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Site Photos: Google Street View, Wikimedia
https://commons.wikimedia.org/wiki/Fi...
Map Imagery: Google Earth
Sky Simulation: Stellarium
Horizon Data from David Hoyle of standingstones.org
http://www.standingstones.org/
Sky and horizon simulation:
peakfinder.org
Dating info:
https://en.wikipedia.org/wiki/Arthur%...
Music: Ambient String Quartet by LuxeXx

See other related videos:

Earlier video on a similar Summer Solstice alignment at Newgrange:
   • Newgrange Summer Solstice Alignment II (Su...  

Video illustrating how the year might have been divided into 16 parts:
   • Dividing the Year - Solstices, Equinoxes, ...  

Light in the Chamber of Newgrange 1/16th of a year pre/post Winter Solstice:
   • Newgrange Light Range  

Kerbstone at nearby Knowth with possible 16 part solar year calendar:
   • Knowth Kerbstone 15 Calendar